import java.util.HashMap;
import com.sun.jna.Native;
import com.sun.jna.platform.win32.WinDef.UINT_PTR;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIFunctionMapper;
import com.sun.jna.win32.W32APITypeMapper;
public class WallpaperChanger {
public interface SPI extends StdCallLibrary {
long SPI_SETDESKWALLPAPER = 20;
long SPIF_UPDATEINIFILE = 0x01;
long SPIF_SENDWININICHANGE = 0x02;
@SuppressWarnings("serial")
SPI INSTANCE = (SPI) Native.loadLibrary("user32", SPI.class,
new HashMap<Object, Object>() {
{
put(OPTION_TYPE_MAPPER, W32APITypeMapper.UNICODE);
put(OPTION_FUNCTION_MAPPER,
W32APIFunctionMapper.UNICODE);
}
});
boolean SystemParametersInfo(UINT_PTR uiAction, UINT_PTR uiParam,
String pvParam, UINT_PTR fWinIni);
}
public static void main(String[] args) {
System.out.println("changing");
String filename = "C:\\wallpapers\\wallpaper.jpg";
SPI.INSTANCE.SystemParametersInfo(
new UINT_PTR(SPI.SPI_SETDESKWALLPAPER), new UINT_PTR(0),
filename, new UINT_PTR(SPI.SPIF_UPDATEINIFILE
| SPI.SPIF_SENDWININICHANGE));
System.out.println("changed");
}
}